I am a happily married woman fast approaching fifty, blonde hair, 5' 7" with 32C boobs, long legs, I have very toned figure which is the result of a regular daily gym regime and fit comfortably into size 10 clothing. People say that I am much younger looking than my age which is no doubt down to the small fortune I spend on beauty treatments. The one problem in my marriage is sex, or the lack of it. I have always had a very high sex drive, which hasn’t waived with age, whilst my husband now no longer seems to want or need sex despite all my considerable efforts. It had get to the stage that I hadn’t been made love to for close on to year, I was getting fed up with using my Rabbit to relive the frustration, so rather than have an affair, I naively thought that I should look for a fuck buddy, or buddies, someone who could take care of my sexual needs every now and again, so I signed up to a dating web site designed for people looking for casual sex and a few swinging web sites and have been very pleased with the attention received. Then a couple of weeks ago our son returned from his final year at university with his roommate Sudeep, who is tall, dark skinned, good looking, with a very good physique, he was a charmer and from conversations with my son quite the ladies’ man. Within a day or so he seemed quite comfortable walking around the house in just shorts and taking advantage of the rare good weather to sun himself in the back garden in skimpy swimming trunks and when we were alone he was flirting outrageously with me, I found his interest to be very flattering. To my shame I would sneak glances at him in the garden, finding any excuse to bring a drink or food out to him, when we were alone in the house, it hadn’t gone unnoticed that the swimming trunks showed the outline of a soft very nice sized cock. I thought that I would do some teasing and started to return from my daily sessions at the gym still in my tight workout clothes, which showed off my trim fit body very nicely, one evening I was dining out with my hubby and wore a short flimsy little black dress with no bra and a pair of high heels. I deliberately paraded myself downstairs whilst my hubby was upstairs. He didn’t even comment on the fact that it was obvious that I had no bra on or the shortness of my dress, but I could sense Sudeep interest in me and his eyes following me around. I thought that I would give him a treat for his interest and stood in front of the downstairs mirror and paced my hands under my boobs and pushed them in a sexy motion upwards, I could see Sudeep having a sly look, teasingly I went over to Sudeep and said “there a bit saggy these days, I need to push them up every now and again”. Sudeep smiled and replied “You look absolutely fabulous; there is no sign of sagging from where I am sitting”. With another chance for a tease I leant forward to give him a peck on the check to thank him for his comments, knowing full well that the flimsy material would move forward to give him a view of my boobs, possibly even a hardened nipple. As I looked down I could see that it worked as his cock was pointing upwards in his shorts and although I only had a quick glimpse it seemed to be so much larger than its flaccid state. One day I was tidying up his room I noticed that his computer was left on and his Facebook page was open at an email he had sent, being inquisitive or nosey I looked at the open page and to my shock the subject line was MILF, reading on it simply read “saying with Thom, his mother is seriously fucking hot, a true MILF, would love to shag her”. Strangely I wasn’t annoyed but found it quite fluttering that a hunky young guy who had no trouble finding female company thought of me as a MILF and wanted to shag me!. In my current state sex with Sudeep seemed very tempting, but I said to myself sense must prevail, so he was completely out of bounds. Then on Friday I returned from a workout at the gym, I thought that the house should be empty, but I heard a noise coming from upstairs, as I walked up the stairs it was clearly a sexual noise, a male voice grunting and groaning. Intrigued I quietly crept upstairs and could hear that the noises were coming from Sudeep’s room. The door was slightly ajar and the voyeur in me took over and I peeped through the door and got the shock of my life, Sudeep didn’t have a girl with him, he was sitting in a chair with his back to the door, naked, in front of his laptop and he was masturbating. I was absolutely speechless, there was a photo of me in a skimpy bikini on the screen, he was close to Cumming and the speed of his hand going up and down his cock was increasing. He was now letting out a string of “Ah, Ah’s” and then his body was shaking and a number of times it jerked, to my shock he quickly grabbed what looked to be a pair of my expensive designer black French knickers and ejaculated into them, releasing a string of very long “Oh’s”